Chuck



Nov. 11, 1930. A. CURRIER CHUCK Filed Oct. 16, 1926 Patented Nov. 11, 1930 ARTHUR L. cumunn, ornnw rrswrcn, imwnamrsnmn once]; i

Application filed October 16, 1926. Serial No. 141,952.

My present invention is a noveland im proved chuck, primarily intended for use as a saw holding chuck in buttonblank cutting machines, and is a continuation in part of my prior and copending application, Serial No...

140,371, filed October 8, 1926, now Patent Number 1,736,901 granted Nov. 26, 1929.

An important feature of the present invention is the provision of a chuck to hold a saw or other cutting or holding instrumentalities,

which chuck will bemanually controlled for disengagement or release of the chuck spun or spool from the spindle, and which will reengage itself in the rotating spindle upon insertion therein.

In the present invention I utilize novel holding, locking, and driving media, substantially as described in my prior and copending application on chucks, Serial No. 179,459 filed March 30, 1927 now Patent Number 1,686,601

granted Oct. 9, 1928.

i In the present novel chuck, I utilize a manually operated locking ring, which ring may be raised by the operator during rotation of the spindle, whereupon the locking and driving means will be disengaged, automatically, by the weight of the chuck spun, and the spun will drop into the hand of the operator. Upon release of the locking ring by the operator the same will drop, by gravity,

into normal position, forcing the locking and driving devices into locking position. Thereupon, when the chuck spun or spool is reinserted into the rotating spindle, spiral grooves on the spool will engage these locking means, preferably balls, and will ride thereon until the chuck spool is firmly seated in the rotating spindle.

I believe that my chuck, illustrated herein, is novel, and have therefore claimed the same broadly.

While I have illustrated my novel chuck herein as holding a saw, it will be appreciated that such a chuck may be utilized in combination with other forms of cutting instrunientalities, with equal facility and efficiency. Referring to the drawings illustrating a preferred embodiment of my invention,

Fig. 1 is a sectional view, part-1y in elevation, of, my novel chuck assembled in driving position; l I ig. 2 is. an elevation. of the chuck spun or spool illustratingthe spiral grooves; and i Fig. 3 is a cross sectional view on the line 3-3 of Fig. 1. 1

As shown in the drawings, my present novel chuckcomprises a chuck spindle 1, hollowed on the interior as illustrated at 2 and having bevelled face 3 onthe lower end of the spindle. Recesses 4 are provided in the spindlel, and contain holding, locking and driving means, preferably balls 5. The inner edges 6 of the recesses 4 are arched over, as shown in Fig. 3, to prevent the balls 5 extending more than a predetermined distance into the interior of the spindle. ,An enclosing, lifting and locking ring 7 is provided, fittedaround the spindleyl. This locking ring 7 is counter bored or recessed at 8, and

again asillustrated at 9, to afiord an annular recess10 spaced sufliciently from the outer surface of the spindle 1 topermit the locking balls 5 to fall or roll ,therein and be released from the spiral grooves 11 in the spool or chuck spun "12. when the ring 7 is lifted. Thus, when the operator desires toremove the spool 12, the ring 7 is raised or elevated, during rotation of the spindle if desired, whereupon, the weight of the chuckspun will force the balls 5into the space or recess 10 providedtherefor in the locking ring, and the spool 12 will drop into the operators hand. The chuck spool 12, as clearly indicatedin Fig. 2,has a pair of spiralgrooves 11, the upper edge of each of these spiral grooves be ing bevelled as indicated at 13. This bevelled edge 13. is the riding or supporting part of the spool on the balls 5, and due,'partly to thisbevelled edge 13 and the spiral formation of the grooves 11, when wear takes place either in the edge 13 or between the bevelled face 14 of the spool 12 and bevelled face 3 of the spindle 1, the chuck spool will ride farther up into the spindle, the grooves 11 riding over the balls 5 and maintaining a constant locked and driving engagement.

The chuck spool has a depending hollow shank 15, adapted to receive a saw or other cutting instrumentality 16, which is preferably of split spring metal, to obtain a tight friction fit within the hollow spindle 15. v 'Being thus hollow, novel holding devices 17 r may also pass through the 'spin'dle l, shank 15 and saw 16, -if desired.- On replacing a i chuck spool in the rotating" spindle, the op- 1 verator simplygrasp-sti e shank 15, inserts the i, I spool12 in thespin'dle recess, whereupon the v I T spiral grooves'll will engage the 'lockingand driving balls hand ride thereon until the loevelled faces stand 1 are ,i n-elose Contact,

v V wh'ereupon the locking balls 5' will act ;-:as.;;;; ;g i

driving media between the rotating spindle 1 and spool 12. F

l 15 An importantfeature and advantage'of l the present'forrnof chuck is'that the entire v p operation of removing the chuck spool and' r I replaoingth'e samernay be performed with-ff; out stopping:the'acti'on or rotationfof' the 2'0 spindle .1; thus greatly expediting removal-v and replacementof the chuckspool and in creasingthe'effieieney'ofthe machine. v It;w'ill*be. appreciated that While I have shown mynovel chuck ihe'r'ein Constructed and arranged for use in combination wit-ha button 'b-l ank'euttingsamltm not limited thereto,- but my novel chuck may'befutilized fin'any'formfof machine and'with form of cutting device wherein a quickly attaehable so readily removable; and positively acting I chuek 'of this type is 'd'esired, "Itfwil-l' a'ls'o" be 'appre ciated that I; nayfvary theflsize, shape and arrangement of parts, within rea son ably wide limits, without departing from thespirit of'the'invention.-'f* v My invention is further described and defined in the form of 'claims asfollows 13A chuelQeomprising a. rotatable'spin--" dlehavinga tapered opening ther'ein,'a tao pered= itool holding spool "having spiral I grooves of varying depth therein'and adapt ed to enter said spindle; spoolholding, lock- 7 ing and driving'memb'ers in said spindle, the I I upper'and lower walls of said groove-s en a a 415 gaging said'members when-said spoo'l is in *serte'din the tapered opening of said spindle 1 v p and :foroibly seating said' spool in said i spindle. I

' "2 'A'ohuolg-feoinprisingarotatalole spindle 5.5-

' having a tiipf redopening thereinyiajtapered 4 tool holding "spool having" spiral-"grooves therein and adapted to enter saidspindle, said spiral grooves terminating adjaoentfth'e' ilpp'erend ofsaid'taperedspoolandinoreas; v ing in'depjth from top endito'bottorn'end of V,

said grooves, and spool holding, locking and driving members in said spindle'adapted to enter said grooves. Z ."Intestim'ony whereof; I have "signed my 7 name to this specification? ARTHUR CURRIER- 

